A7121A
DC-DC CONVERTER BUCK (STEP-DOWN)
1MHz, 2.0A, SYNCHRONOUS
AiT Semiconductor Inc.
www.ait-ic.com
ELECTRICAL CHARACTERISTICSNOTE3
VIN =VEN= 3.6V, TA = 25°C, unless otherwise noted.
Parameter
Input Voltage Range
Input DC Supply Current
Active Mode
Conditions
Min.
2.7
Typ.
Max.
6.0
Unit
V
VFB=0.5V or VOUT=90%
VFB=0V, VIN=4.2V
TA = +25°C
60
300
1
μA
μA
V
Shutdown Mode
0.1
0.5880 0.6000 0.6120
0.5865 0.6000 0.6135
0.5820 0.6000 0.6180
±30
Regulated Feedback Voltage
VFB Input Bias Current
0°C ≤ TA ≤ 85°C
-40°C ≤ TA ≤ 85°C
VFB = 0.65V
V
V
nA
%/V
%/V
%/A
Reference Voltage Line Regulation VIN = 2.7V to 5.5V, IOUT=300mA
0.5
0.5
0.60
0.60
Output Voltage Line Regulation
Output Voltage Load Regulation
VIN = 2.7V to 5.5V IOUT=300mA
IOUT=300 to 2000mA
0.25
VIN=3V, VFB=0.5V or
Peak Inductor Current
4.5
A
VOUT=90%, Duty Cycle <35%
Oscillator Frequency
VFB=0.6V or VOUT=100%
ILX = 300mA
0.8
1.0
110
80
1.2
±1
MHz
mΩ
mΩ
RDS(ON) of P-CH MOSFET
RDS(ON) of N-CH MOSFET
ILX = -300mA
VEN = 0V, VLX = 0V or 5V,
LX Leakage
Soft start
UVLO
±0.01
μA
VIN = 5V
1
ms
V
VIN Rising
VIN Falling
2.3
2
2.5
2.2
2.7
2.4
0.6
V
EN Threshold Low
V
-40°C ≤ TA ≤ 85°C
EN Threshold High
EN Leakage Current
Thermal Shutdown NOTE 4
1.1
V
±0.01
155
±1
μA
℃
Measured FB, With Respect to
VREF
PG
85
91.5
%
NOTE 1: Thermal Resistance is specified with approximately 1 square of 1 oz copper.
NOTE 2: TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formula:
A7121A: TJ = TA + (PD)x(220°C/W)
NOTE 3: Specifications over the temperature range are guaranteed by design and characterization.
NOTE 4: Guaranteed by design and characterization only.
REV1.3
- JUL 2013 RELEASED, NOV 2016 UPDATED -
- 4 -
AITSEMI [ AiT Semiconductor ]
